Question

read the passage.
as the tallest freestanding mountain in the world, mount kilimanjaro has long attracted adventurous mountaineers. towering twenty thousand feet above africas plains, kilimanjaro represents an exciting—and potentially dangerous—adventure. one of the main obstacles climbers face is altitude sickness, a condition induced by sudden changes in elevation. symptoms such as headaches, shortness of breath, and nausea occur as air pressure drops and oxygen levels decrease at higher altitudes. to avoid experiencing the physical side effects related to this shift, visitors to kilimanjaro must give themselves adequate time to adjust to new atmospheric conditions. experts advise climbers to travel slowly, rest frequently, and follow routes that offer a more gradual ascent. its also critical to eat and drink regularly, dress appropriately, and hire a skilled guide trained to handle emergencies. while some reach kilimanjaros summit in roughly five days, planning an eight- to nine-day trek is a safer, more practical option.
based on the passage, how can climbers avoid altitude sickness while ascending kilimanjaro?
climbers can take special nutritional supplements to counteract nausea.
climbers can plan slower journeys that let them adjust to pressure changes.
climbers can summit and descend the mountain before the sickness sets in.
climbers can dress in light, breathable fabrics to oxygenate their bodies.

Explanation:

The passage states that altitude sickness is caused by sudden elevation changes. It advises climbers to "give themselves adequate time to adjust to new atmospheric conditions" and mentions that experts recommend "travel slowly, rest frequently, and follow routes that offer a more gradual ascent." Planning an eight - to nine - day trek (a slower journey) is also presented as a safer option. This aligns with the idea of planning slower journeys for adjustment.
The first option about nutritional supplements is not mentioned in the passage. The third option about summiting and descending before sickness sets in contradicts the advice of taking time (as altitude sickness is related to the ascent process). The fourth option about dressing in light fabrics for oxygenation is not supported by the text; the passage mentions dressing appropriately but not for oxygenation in that way.

Answer:

Climbers can plan slower journeys that let them adjust to pressure changes.